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Radiant|Lab Grown|IGI

1.21ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG786693953

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG786693953

Diamond specifications and retailer prices

From €124 EUR
$138 USD
As of November 2, 2026
Save €590 EUR (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €714 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG786693953 or 786693953. Listed at 18 retailers as of November 1, 2026, with prices from €124 to €714, a €590 spread on the same certified stone. MOH London lists it at €714. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.21
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.5°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786693953
Dimensions7.40 × 5.30 × 3.57 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.40 mm5.30 mm1.21 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786693953
Side View
Table 63.0%Crown 41.5°Girdle: MediumPavilion 34.9°Culet: NoneDepth 67.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: €714 EUR|Low: €118 EUR|High: €1,074 EUR|Avg: €367 EUR|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 11€124 EUR
Retailer 3€143 EUR
Retailer 4€153 EUR
Retailer 13€153 EUR
Retailer 6€208 EUR
Retailer 2€260 EUR
Retailer 7€267 EUR
Retailer 10€298 EUR
Retailer 8€361 EUR
Retailer 5€380 EUR
Retailer 14€491 EUR
Retailer 12€622 EUR
Retailer 9€698 EUR
MOH London€714 EUR

45 data points across 14 retailers

18 retailers€124 EUR to €714 EUR

A
Cheapest Retailer
-
€124 EUR
$138 USD
A
Retailer 2
-
€143 EUR
$160 USD
View
Retailer 3
-
€153 EUR
$171 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
€153 EUR
$171 USD
View
A
Retailer 5
-
€183 EUR
HK$1,600 HKD
View
B+
Retailer 6
-
€208 EUR
$232 USD
View
A
Retailer 7
-
€260 EUR
£229 GBP
View
A
Retailer 8
-
€267 EUR
View
A
Retailer 9
-
€298 EUR
£262 GBP
View
A
Retailer 10
-
€361 EUR
$403 USD
View
A
Retailer 11
-
€380 EUR
$424 USD
View
A
Retailer 12
-
€383 EUR
$428 USD
View
B+
Retailer 13
-
€491 EUR
$549 USD
View
B+
Retailer 14
-
€515 EUR
SGD 778 SGD
View
B+
Retailer 15
-
€541 EUR
$604 USD
View
Retailer 16
-
€622 EUR
$695 USD
View
Price last confirmed 28 days ago
B
Retailer 17
-
€698 EUR
$780 USD
View
Most Expensive
B
MOH London
LG786693953 · Nov 1
€714 EUR
£628 GBP
View
17 more retailers have this diamond
Prices start from €124 EURSave up to €590 EUR

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.21ct Radiant
€124 EUR